perpendicular, plumb, upright, upward, erect, on end, cocked up, straight up.
"vertical." YourDictionary, n.d. Web. 09 November 2018. <https://thesaurus.yourdictionary.com/vertical>.
vertical. (n.d.). Retrieved November 09th, 2018, from https://thesaurus.yourdictionary.com/vertical
At right angles to the horizon or to level ground:
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